/*
 * Copyright 2012 LIG SIGMA
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package fr.lig.sigma.astral.core.operators.streamer;

import fr.lig.sigma.astral.common.Batch;
import fr.lig.sigma.astral.common.Tuple;
import fr.lig.sigma.astral.common.structure.Relation;
import fr.lig.sigma.astral.common.structure.TupleSet;
import fr.lig.sigma.astral.operators.Operator;
import org.apache.felix.ipojo.annotations.Component;
import org.apache.felix.ipojo.annotations.Provides;
import org.apache.felix.ipojo.annotations.Requires;
import org.apache.felix.ipojo.annotations.Validate;

/**
 * @author Loic Petit
 */
@Component
@Provides
public class Rsu extends UpdateStreamer implements Operator {
    @Requires(id = "in")
    private Relation in;

    public void prepare() {
        setInput(in, false);
    }

    public Rsu() {
        operatorName = "R_S^u";
    }

    public void processUpdate(TupleSet old, TupleSet current, Batch b) {
        for (Tuple t : current)
            put(t, b.getTimestamp());
    }
}